Heating device



FIG. 1 is a front perspective view of a heating device in a raised position;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front perspective view thereof in a lowered position:

FIG. 4 is a front perspective view of the heating reflector cassette portion of the heating device, shown separately for clarity of illustration:

FIG. 5 is a rear perspective view of FIG. 4;

FIG. 6 is an enlarged top view thereof; and,

FIG. 7 is an enlarged bottom view thereof. 

The ornamental design for a heating device, as shown. 